電化學石英晶體微天平
產品型號：eQCM 15MTMGamry 的 eQCM 15M™ 是一款電化學石英晶體微天平 (Electrochemical Quartz Crystal Microbalance, EQCM) ，可搭配任何 Gamry Reference 或 Interface 系列恆電位儀使用。eQCM 為研究界面反應提供了一項極具價值的分析工具。腐蝕、離子嵌入、離子吸附、高分子成長以及感測器結合等，皆屬於會造成質量變化的界面反應。這些質量變化可藉由監測振盪石英晶體的共振頻率變化進行量測。
產品介紹
eQCM 15M 是一款用途廣泛的電化學石英晶體微天平，可支援 1 ~ 15 MHz 的任何石英晶體，並可搭配任何電化學池或晶體夾具使用。其量測解析度可偵測 ng/cm² 等級的質量變化，相當於小於一層單分子膜的質量。本系統提供完整的入門套件，包括eQCM 15M 主機、5 MHz 鍍金石英晶體（5 片）、靜態電化學池、連接線、操作手冊及軟體。
eQCM 15M 特色
l 支援任何 1 ~ 15 MHz 石英晶體，可搭配任何電化學池使用。
l 可偵測 ng/cm² 等級的質量變化。
l USB 通訊介面。
l 整合 eQCM 與 Gamry 恆電位儀同步資料擷取。
l 透過阻抗掃描可同時取得串聯共振頻率 (ƒs) 及並聯共振頻率 (ƒp) 。
l 可利用 Gamry 功能強大且可高度自訂的 Echem Analyst 2™ 進行資料分析。
eQCM 應用
l 導電高分子
l 鋰離子嵌入研究
l 腐蝕研究
l 電沉積
l 自組裝單分子膜
l 抗體－抗原作用分析
l 界面活性劑吸附
l 蛋白質吸附
l 離子及溶劑傳輸研究
eQCM 15M 可快速掃描兩個共振頻率附近的頻率範圍（有關兩個共振頻率的詳細說明，可參閱 Basics of an eQCM Quartz Crystal Microbalance App Note）。掃描兩個共振頻率最大的優點是無需補償寄生電容即可維持石英晶體振盪。此外，每取得一筆資料時，系統都會同步顯示相對阻抗頻譜，方便使用者判斷電極表面是否產生氣泡及電化學池安裝是否正確。同時取得 ƒs 與 ƒp 兩個共振頻率，也可用於定性分析耗散的變化。當 ƒs 與 ƒp 變化趨勢一致時，表示薄膜具有較高剛性。反之，當 ƒs 與 ƒp 的變化不同時，表示薄膜屬於非剛性。
Resonator 軟體功能亦可調整石英晶體的驅動振幅。此功能在離子液體或高黏度溶液中特別重要，由於上述介質具有較大的阻尼效應，手動提高驅動振幅可使承受較大負載的石英晶體仍能正常工作。相較於一般耗散量測法或時間解析量測法，此設計具有明顯優勢。
所有資料分析皆可於功能完整且高度可自訂的 Echem Analyst 2™ 軟體中完成。軟體提供多種繪圖方式，可依需求呈現資料，包括質量變化－時間、質量－電荷、質量－電位、及耗散－時間（基本模式）。
石英晶體清潔
一般而言，石英晶體微天平晶體多視為一次性耗材。若需重複使用，可使用酸性 Piranha 溶液進行清洗，但操作時務必採取所有必要的安全防護措施。Piranha 溶液具有高度危險性，使用前應先詳閱材料安全資料表，並接受適當的安全操作訓練。
一套軟件完成不同資料擷取，QCM及恆電位儀分別由不同分頁控制。
頻率量測
|
量測範圍 |
1~15 MHz |
|
解析度 |
0.02 Hz |
環境
|
操作溫度 |
0~45°C |
|
相對濕度 |
最高 90%（非凝結） |
|
儲存及運輸溫度 |
-25~75°C |
|
最大運輸加速度 |
30 G |
一般規格
|
功耗 |
3.5 W |
|
尺寸 |
175 × 115 × 80 mm |
|
重量 |
1 kg |
系統需求
USB 2.0 或 USB C
Microsoft® Windows™ 10/11
Gamry’s eQCM 15M™ is an electrochemical quartz crystal microbalance (EQCM) compatible with any Gamry Reference or Interface Potentiostat. The EQCM adds a valuable tool in the analytical toolbox of anyone investigating interfacial processes. Corrosion, ion intercalation, ion adsorption, polymer growth, and sensor binding events are all interfacial processes that produce mass changes. These mass changes can be measured by monitoring the resonant frequencies of an oscillating quartz crystal.
Product Details
The eQCM 15M is a versatile electrochemical quartz crystal microbalance (EQCM) that accommodates any crystal from 1 ~ 15 MHz in any cell or holder. Its resolution allows you to detect mass changes on the ng/cm2 scale. This is less than a monolayer of material! Our system comes with everything you need to get started – the eQCM 15M, 5 MHz Au-coated crystals (5x), static cell, cables, manuals, and software.
eQCM 15M Features
l Any crystal from 1 ~ 15 MHz in any cell
l Detect ng/cm2
l USB Interface
l Integrated QCM and Gamry Potentiostat acquisition
l Impedance scanning gives both ƒs and ƒp, the series and parallel resonant frequencies
l Data Analysis in Gamry’s flexible and customizable Echem Analyst 2™
eQCM Applications
l Electroactive Polymers
l Li+ Intercalation
l Corrosion Studies
l Electrodeposition
l Self-Assembled Monolayers
l Antibody-Antigen Interactions
l Surfactant Adsorption
l Protein Adsorption
l Ion and Solvent Transport
The eQCM 15M rapidly scans a frequency window around the two resonant frequencies (these resonant frequencies are explained in our Basics of an eQCM Quartz Crystal Microbalance App Note). The advantage of scanning through the two resonant frequencies is that you no longer need to cancel the parasitic capacitance in order to maintain oscillation. Additionally, the relative impedance spectrum is displayed each time a data point is acquired, giving you insight into bubble formation on your electrode or improper cell setup. Having the two resonant frequencies also allows you to qualitatively see dissipation changes. When ƒs and ƒp respond similarly your film is rigid, however, when ƒs and ƒp respond differently the film is not rigid.
Resonator also allows you to adjust the driving amplitude of the crystal. This is especially important when working in an ionic liquid (IL) or a viscous solution where damping is especially high. The ability to manually increase the driving amplitude for heavily-loaded crystals offers a significant advantage over straight dissipation or time-resolved techniques.
Data analysis is done in our flexible and customizable Echem Analyst 2™. We give you a variety of plotting options to allow you to display the data as you want. You can plot straight mass change versus time, mass versus charge, mass versus potential, or a basic form of dissipation versus time.
Cleaning Crystals
A note about cleaning Quartz Crystal Microbalance crystals. We typically think of crystals as one-time use items but if you need to clean them, Pirhanna solution (the acidic one) can work well but take all of the necessary precautions when dealing with this solution. It is very dangerous and you should consult an MSDS and have proper safety training before using.
Data acquisition is controlled with one program. QCM control is on one tab while potentiostat control is on another tab.
FREQUENCY MEASUREMENT
|
Range |
1~15 MHz |
|
Resolution |
0.02 Hz |
ENVIRONMENTAL
|
Operating Temperature Range |
0~45°C |
|
Relative Humidity |
Maximum 90% (non-condensing) |
|
Storage and Shipping Temperature |
-25~75°C |
|
Maximum Shipping Acceleration |
30 G |
GENERAL
|
Power |
3.5 W |
|
Dimensions |
175 × 115 × 80 mm |
|
Weight |
1 kg |
System Requirements
USB 2.0 or USB C
Microsoft® Windows™ 10/11
